一起因转子绕组形变导致发电机振动大的案例分析
杨玉磊
（中国大唐集团科学技术研究院有限公司华东电力试验研究院，安徽 合肥 230088）
摘 要：随着大容量高参数发电机的普遍应用，发电机两端振动随负荷变化异常增大的案例也越来越多。介绍了一台1 000 MW汽轮发电机自投运2 年后10 瓦振动在高负荷阶段异常持续增大的分析和处理过程。给出了振动异常特征，通过转子返厂解体检修，最终确认护环下外层全尺寸绝缘瓦堆起引起转子端部绕组形变和通风孔部分堵塞是引起发电机振动异常变化的直接原因，并给出了解决措施，以防同类型故障再次发生。
关键词：发电机；转子绕组；振动大；热不平衡；绕组形变
中图分类号：TM311 文献标识码：B 文章编号：1007-3175(2021)03-0058-04
A Case Study of Generator Vibration Increases Caused by Rotor Winding Deformation
YANG Yu-lei
（China Datang Corporation Science and Technology Research Institute Co., Ltd East China Electric
Power Test & Research Institute, Hefei 230088, China）
Abstract: With the widespread application of large-capacity and high-parameter generators in the field of coal-fired power generation, there are more and more cases in which the vibration at both ends of the generator increases abnormally with load changes. This paper introduces in detail the analysis and treatment process of the abnormal continuous increase of the 10-watt vibration of a 1 000 MW turbo-generator after it has been put into operation for two years. After the rotor returned to the factory for disassembly and overhaul, it was finally confirmed that the stacking of the full-size insulating tiles under the guard ring caused partial blockage of the winding deformation of the rotor end and the ventilation holes were the direct causes of abnormal vibration of the generator, and provided solutions to prevent the same type of failure happening again.
Key words: generator; rotor winding; vibration increases; thermal unbalance; winding deformation
参考文献
[1] 牟法海，吕冬梅，曹伟，等.600 MW汽轮发电机不稳定振动故障诊断与处理[J]. 大电机技术，2019(3) ：38-42.
[2] 陈自强，杨璋. 大型核电汽轮发电机热致振动试验研究[J]. 大电机技术，2018(6) ：57-61.
[3] 刘树鹏，葛祥. 某电厂发电机振动故障诊断及处理[J]. 大电机技术，2016(3) ：15-18.
[4] 张国强，杨溢. 汽轮发电机振动故障分析与诊断[J]. 大电机技术，2011(5) ：29-34.
